{"product_id":"sunrace-m57-long-cage-7-8-rear-derailleur-rrdr0412-bicycle-rear-derailleur","title":"Sunrace RDM57 7 - 8-Speed Long Cage Rear Derailleur for MTB, Aluminum and Steel Construction, Compatible with Shimano Drivetrains, Black","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eUpgrade your mountain biking performance with the Sunrace RDM57 Rear Derailleur - a reliable, durable, and high-performance component designed for 7\/8-speed drivetrains. Built with precision engineering, this long cage derailleur delivers smooth, accurate shifting across a wide gear range, making it ideal for aggressive trail riding, XC racing, and versatile mountain biking applications.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eMaterials \u0026amp; Construction:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eConstructed from high-quality aluminum and steel, the Sunrace RDM57 ensures long-lasting durability and resistance to the rigors of off-road riding. Its engineered polymer and steel components contribute to a lightweight design without sacrificing strength, weighing just 355 grams for optimal performance and maneuverability.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003ePerformance \u0026amp; Engineering:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003eFeaturing a 2:1 actuation ratio compatible with most Shimano 3x7\/8-speed drivetrains, the RDM57 offers precise and responsive gear shifts, even under demanding riding conditions. Its 11-tooth pulleys optimize chain stability and efficiency, improving power transfer and reducing drivetrain wear. With a maximum capacity of 43T, it accommodates a broad range of cassette sizes from 11T to 34T, providing versatility for various gearing setups.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003eComponents \u0026amp; Technology:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003eThis derailleur boasts a robust long cage design, making it suitable for bikes with larger gear ratios and mountain terrain. The inclusion of a barrel adjuster allows for fine-tuning shifting performance, ensuring smooth gear transitions across all gears. Note: Not compatible with Shimano MegaRange cassettes, but it is comparable to Shimano RD-M360, RD-M410, RD-M310, and RD-M280 models.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003eStyle \u0026amp; Use Case:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003eDesigned in a sleek black finish, the Sunrace RDM57 seamlessly integrates with mountain bike aesthetics while offering rugged performance. Its standard 10x1 mount type makes installation straightforward on most mountain bikes. The removable hanger option provides flexibility for direct mount or hanger mount setups, enhancing compatibility with various frame designs.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative Features:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Wide gear range suitability with a 43T capacity\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Compatibility with 7\/8-speed mountain bike drivetrains\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Durable aluminum and steel construction for off-road resilience\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Precise 2:1 actuation ratio for cleaner, more reliable shifts\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Removable hanger for versatile mounting options\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003eMaximize your mountain biking adventures with the Sunrace RDM57 Rear Derailleur - engineered for durability, precision, and versatility. Whether tackling rugged trails or alpine climbs, this derailleur ensures confident shifting and smooth ride quality every time.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eHigh-performance 7\/8-speed rear derailleur designed for mountain biking and hybrid cycling applications, suitable for use with Shimano 3x drivetrains for seamless gear shifting.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable aluminum and steel materials, this derailleur offers excellent strength, corrosion resistance, and lightweight performance, ensuring long-lasting reliability on rugged trails.\u003c\/li\u003e\n\u003cli\u003eFeatures advanced 2:1 actuation ratio and 11-tooth pulleys for precise, smooth shifting performance, optimized for tactical control and enhanced drivetrain efficiency across a wide gear range.\u003c\/li\u003e\n\u003cli\u003eEquipped with a long cage and capacity for up to 43 teeth, this derailleur accommodates wide-range cassettes (11-34t) for versatile riding styles, including climbing steep gradients and high-speed descents.\u003c\/li\u003e\n\u003cli\u003eIncludes a removable hanger for easy installation and compatibility with direct mount or hanger mount frames, making it a versatile upgrade for mountain bikes seeking reliable performance and style.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Sunrace","offers":[{"title":"Default Title","offer_id":42204278784067,"sku":"RRDR0412","price":21.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/250550.jpg?v=1779357004","url":"https:\/\/365cycles.com\/products\/sunrace-m57-long-cage-7-8-rear-derailleur-rrdr0412-bicycle-rear-derailleur","provider":"365 Cycles","version":"1.0","type":"link"}